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The performance of western hemlock, sugar pine, and western larch as alternatives to western redcedar (WRC) for roof shingles was investigated on outdoor roof racks with and without an initial brush or dip treatment with either pentachlorophenol (penta) or chromated copper arsenate (CCA). Untreated shingles of all species experienced degradation over a 32-year exposure in western Oregon, but WRC provided the best performance. Penta treatments improved performance to some extent, but the best protection was provided by a dip treatment in CCA prior to installation. The results illustrate the benefits of even shallow surface protection in aboveground exposures., Western redcedar (Thuja plicata Donn) has long been used for roof shingles and shakes because its heartwood has a well-known reputation for both durability and dimensional stability (Scheffer and Morrell [...]

Abstract Biocide retentions for copper-based wood preservatives used for residential ground-contact applications are established through field stake tests using small research stakes cut from selected sapwood and then treated in [...]

Abstract This paper contains a review of the literature related to vaporization of organic wood preservatives, pentachlorophenol and creosote from treated samples of lumber. These studies are related to the [...]

P.A. Cooper * J.N.R. Ruddick * ABSTRACT Fixation rates of chromated copper arsenate (CCA) type C wood preservative in earlywood, latewood (cut from sapwood), whole sapwood, and whole heartwood of [...]

STAN T. LEBOW (*) ABSTRACT Incising is used to increase exposed wood surface and improve uptake and penetration of preservative during pressure treatment of refractory species. However, incising may also [...]

A two-component water-based epoxy topcoat has been developed with the potential to match the performance of a solvent-based system and which could replace current solvent systems. To develop a low-/no-VOC [...]

Wood can be considered as quite a sensitive material. In most cases, wood has to be treated first before it can be commercialized, where treatment may range from chemical preservation, [...]

Currently, the evaluation of wood decay in lab and field tests generally is done by determining mass loss and visual inspection, respectively. Those methods are very poor predictors of the [...]

XIPING WANG [*] ROBERT J. Ross [*] JOHN R. ERICKSON [*] GARY D. MCGINNIS [*] RODNEY C. DE GROOT [*] ABSTRACT Stress-wave-based nondestructive evaluation methods were used to evaluate the [...]

Olav Skretteberg, joint managing director of wood window and door specialist Broxwood reports on alternative methods of making wood last longer In many European countries there are houses and other [...]

Wood scientist Elizabeth Dunningham has recently completed her PhD through the University of Wales in Bangor. Her thesis investigated a method of improving the dimensional stability of wood in-service, using [...]

The International Research Group on Wood Preservation (IRG), an independent research group set up in 1969, meets annually for presentations of research papers and discussions on biological topics, test methodology, [...]

INTRODUCTION Although weathering does not affect the structural strength of wood,[1] changes in surface integrity severely impair the performance of exterior coatings applied to wood.[2] Many materials have been suggested [...]